Beater.



PATBNTBD DEC. 25, 1906.

F. J. WOLFF.

BEATBR.

APPLIUATION FILED uns rn: NoRRls Permis co.. wAsmNaraN. n. c.

FREDRICK J. WOLFF, OF KANSAS CITY, MISSOURI.

BEATER.

Specication of Letters Patent.

Patented Dec. 25, 1906.

application filed May 3, 1906. Serial No. 315,066.

To all whont t 71u03/ concern.'

Be it known that l, FRIEDRICH J. W'OLFF,

a citizen of the United States, residing at Kansas City, in the countyof Jackson and State of Missouri, have invented certain new and usefulImprovements in Beaters, of which the following is a specification.

This invention relates to rotary beaters for sack-cleaning' machines;and my object is to produce a device of this character of simple,strong, durable, and cheap construction and which will thoroughly andefficiently clean flour-sacks and other fabric sacks without injuringthem.

To this end the invention consists in certain novel and peculiarfeatures of construction, as hereinafter described and claimed; and inorder that it may be fully understood reference is to be had to theaccompanying drawings, in which- Figure l is a plan view of a rotarybeater embodying my invention. Fig. 2 is a crosssection of the same.Fig. 3 is a cross-section of a slightly-modified construction of thesame. Fig. 4 is a sectional perspective view of a second modification.

ln the said drawings the shaft of the beater comprises a body portion l,which is preferably of rectangular form in cross-section, and

cylindrical ends 2, adapted to be iournaled in any suitable bearings.(Not shown) At suitable intervals the body portion l 1s provided withthreaded passages 3 to receive screw-bolts 4, which extend throughrubber or equivalent flexible strips 5 and clamp the same rigidly toopposite sides of the shaft. ln my preferred construction the rubberstrips 5 are formed integral, with oppositely-projecting portions 6, bypreference slightly narrower than strips 5, and said portions 6 areriveted, as at 7, to strips 5 near the outer edges of the latter.

ln Fig. 2 the strips 5 extend horizontally and the portions 6 convergeoutwardly with respect to said strips, whereas in Fig. 3 the strips andthe engaging portions 6 both incline outwardly, the latter constructionbeing less flexible than the former, because its strip 5 and portion 6at the point where they are fastened together tend to move in planeswhich intersect each other at greater angles than the correspondingpoint of said strip and portion in Fig. 2, as will be seen by referenceto the intersecting dotted arrows in j b being struck from and flexiblesaid figures, the arrow l l l l l the axis of movement of strip 5 andthe arrow c from the axis of portion 6 in each figure. In practice bothtypes of construction operate efficiently and reliably.

In the construction shown by Fig. 4 the strips 5 are braced againstexcessive flexibility by wood blocks 8 instead of by the rubber orequivalent braces 6 of the constructions above described, such woodblocks being of sufficient thickness when fitted against said strips andthe opposite sides of the shaft to project beyond opposite edges of thelatter, so as to provide shoulders 9, against which the inner ends ofthe strips fit, it being unnecessary to fasten the blocks 8 to the shaftcxcept through the instrumentality of the strips, because the resistanceof the sack being cleaned is suflicient to cause said blocks to pressinwardly at their inner edges against the sides of the shaft. Materialmovement in the opposite direction is prevented because the strips areof heavy material and bend but slightly contiguous to the shaft.

10 indicates sheet-metal cap-plates covering the heads of thesecuring-bolts 4, and secured at their edges, as at ll, to the strips 5,said securing devices ll being also utilized, if desired, as the meansfor securing the strips and braces S together. These caps perform anadditional function-namely, to prevent any ravelings of the sacks fromcatching onto the screw-bolts, which might result in injury to thesacks. If desired, these caps may also be used in the constructionsillustrated in Figs. 2 and 3.

From the above description it will be apparent that l have produced arotary beater for use in sack-cleaning machines which possesses thefeatures of advantage enumerated as desirable in the statement of theobject of the invention, which obviously may be modified in otherparticulars without departing from the principle of constructioninvolved.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, isr

l. A rotary beater, comprising a shaft, a iiexible strip secured to saidshaft and projecting beyond one side of the same, and a brace secured tosaid flexible strip and engaging said shaft.

2. -A rotary beater, comprising a shaft, fiexible strips secured to saidshaft and pro- 'ecting beyond opposite sides of the same, bracesconverging outwardwith IOO IIO

respect to the strips and secured to the latter i outer edge of thelatter, and means for clampand engaging the shaft. ing said strip andbrace rigidly to the shaft. Io 3. A rotary beater, comprising a'shaft, aIn testimony whereof I aiiX my signature flexible strip engaging thesame and projectin thepresence of tWo Witnesses.

ing beyond one side thereof, a brace engaging FREDRICK J. VVOLFF` theshaft at its opposite side from said strip I WitnessszR I H. ODGERS,

G. Y.- THORPE.

and projecting beyond the same side of the Shaft and secured to saidstrip inward of the

